Interrelation of CCM (Steel Billet Continuous Casting Machine) Tube Steel Casting Parameters and Hot-Rolled Plate Quality

2021 ◽  
Vol 316 ◽  
pp. 479-483
Author(s):  
A.M. Stolyarov ◽  
Ye.A. Buneyeva ◽  
M.V. Potapova
Keyword(s):  
Continuous Casting Machine ◽  
Casting Machine ◽  
Intermediate Ladle ◽  
Rolled Plate ◽  
Tube Steel ◽  
Liquidus Point ◽  
Metallic Inclusions ◽  
Hot Rolled ◽  
Rolled Plates

The quality of the hot-rolled plate up to 36 mm thick was estimated by the percentage of rolled products, sorted due to the presence of a surface defect "Non-metallic inclusions", and internal defects, detected by ultrasonic plate control. The analysis of the data on the total sorting of hot-rolled plates demonstrated that the amount of sorting differs significantly on the melting from which each series of tubular metal casting commenced, compared to all the other melting in the series. The sorting of the sheets rolled from the metal of the first in a series of melting proved to be 1.9 times higher than that of the metal of all other melts. The main reason (in 68% of cases) of sorting is the presence of non-metallic inclusions on the surface of the plates. The effect of sorting of hot-rolled plates on non-metallic inclusions of various parameters has been studied: the duration of the intermediate ladle-heating; the length of time from the end of the heating of the intermediate ladle, prior to the beginning of the casting; lining temperatures of the intermediate ladle before the beginning of casting; duration of filling the intermediate ladle; the filling rate of the intermediate ladle with metal; mass of metal in the intermediate ladle before the beginning of casting into the crystallizer; chemical composition of metal; overheating of the metal over the liquidus point at the beginning, middle and end of the casting. On the sorting of flat products for non-metallic inclusions, of all the parameters considered, a statistically significant effect is due only to the overheating of the metal above the liquidus point, which varies in the range from 19 to 35 ° C. In order to obtain an acceptable quality of both the surface of slabs and the surface of hot-rolled plates for non-metallic inclusions, the first in a series of melts recommends overheating of the metal in the intermediate ladle above the liquidus temperature of 30-35 ° C.

Application of Quenching-Partitioning-Tempering Process in Hot Rolled Plate Fabrication

2010 ◽  
Vol 654-656 ◽  
pp. 82-85 ◽  
Author(s):  
Shu Zhou ◽  
Ying Wang ◽  
Nai Lu Chen ◽  
Yong Hua Rong ◽  
Jian Feng Gu
Keyword(s):  
Mechanical Properties ◽  
Retained Austenite ◽  
High Strength Steels ◽  
High Strength ◽  
Significant Fraction ◽  
Rolled Plate ◽  
Quenching And Partitioning ◽  
Good Ductility ◽  
Hot Rolled ◽  
Rolled Plates

The quenching-partitioning-tempering (Q-P-T) process, based on the quenching and partitioning (Q&P) treatment, has been proposed for producing high strength steels containing significant fraction of film-like retained austenite and controlled amount of fine martensite laths. In this study, a set of Q-P-T processes for C-Mn-Si-Ni-Nb hot rolled plates are designed and realized. The steels with Q-P-T processes present a combination of high strength and relatively good ductility. The origin of such mechanical properties is revealed by microstructure characterization.

The effect of the design of the metal receiver slab continuous casting machine on the movement of metal in the intermediate ladle when the metal stream deviates from the desired position. Part I. Formulation of the problem

2020 ◽  
pp. 11-16
Author(s):  
S. V. Sukharev ◽  
A. V. Zabolotsky ◽  
P. V. Kotrovsky ◽  
M. Yu. Turchin
Keyword(s):  
Computer Simulation ◽  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Intermediate Ladle ◽  
Metal Stream ◽  
Large Capacity ◽  
Slab Continuous Casting ◽  
Input Point ◽  
Flow Turbulence

The article is devoted to assessing the effect of the design of the metal receiver in the intermediate ladle of the large capacity slab continuous casting machine on reducing the turbulence of flows when the metal stream deviates from the required position during casting. The results of computer simulation of industrial variants of displacement of a stream of metal from a steel pouring ladle to an intermediate ladle from the target input point are presented. The distribution of metal flows in the tundish is compared with different designs of metal receivers. Recommendations are given for reducing flow turbulence for the cases considered. Ill. 6. Ref. 5.

The effect of the design of the metal receiver slab continuous casting machine on the movement of metal in the intermediate ladle when the metal stream deviates from the desired position. Part III. Research results

2020 ◽  
pp. 5-8
Author(s):  
S. V. Sukharev ◽  
A. V. Zabolotsky ◽  
P. V. Kotrovsky ◽  
M. Yu. Turchin
Keyword(s):  
Computer Simulation ◽  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Intermediate Ladle ◽  
Metal Stream ◽  
Research Results ◽  
Slab Continuous Casting ◽  
Input Point ◽  
Flow Turbulence

The article is devoted to assessing the influence of the design of a metal receiver in an intermediate ladle of large capacity slab continuous casting machines on reducing turbulence in flows when the metal stream deviates from the required position during casting. The results of computer simulation of industrial variants of displacing a stream of metal from a steel pouring ladle to an intermediate ladle from the target input point are presented. The distribution of metal flows in the tundish is compared with different designs of metal receivers. Recommendations are given for reducing flow turbulence for the cases considered. Ill. 5. Ref. 3.

Designing of a Novel Shroud for Improving the Quality of Steel in Tundish

2012 ◽  
Vol 585 ◽  
pp. 359-363 ◽  
Author(s):  
Debasish Chatterjee
Keyword(s):  
Continuous Casting ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Steel Production ◽  
Metal Bath ◽  
Ladle Slag ◽  
Exchange Operation ◽  
Slag Entrainment ◽  
Steel Flow

In present 92.8% of world steel production is casted on continuous casting machine. The key phase of continuous casting is tundish. Beside of refining effect of slag phase also steel flow in tundish is very important factor. The main causes for inclusion formation and contamination of the melt include reoxidation of the melt by air and carried over oxidizing ladle slag, entrainment of tundish and ladle slag, and emulsification of these slags into the melt. These causes are due to generation of turbulence in the melt. Although turbo stop lowers the turbulence in some extent. But it is not capable of totally decrease of turbulence specially during lowering of metal bath at the time of ladle exchange operation, cause contamination of the steel melt in tundish. So in the present work it has been focused to develop a novel shroud which have significant role to supply of steel from ladle to tundish at slow rate to avoid turbulence, emulsification and formation of slag eye in tundish to produce quality steel in a sustained manner.

scholarly journals MATHEMATICAL MODELING OF THE DISTRIBUTION OF ARGON IN A TUNDISH WITH A MOLTEN METAL DURING FILLING

2020 ◽  
pp. 130-135
Author(s):  
Kyrylo Serhiiovych Krasnikov
Keyword(s):  
Mathematical Modeling ◽  
Stokes Equations ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Intermediate Ladle ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Software Application ◽  
The Status ◽  
Volume Method

The article is devoted to the mathematical description of the process of filling an intermediate ladle (tundish) with argon, which is blown into the melt stream falling from the steel casting ladle, which is common at metallurgical plants. Metallurgical plants use an intermediate ladle to reliably supply a continuous casting machine for the melt. Also important for the tundish is the removal of non-metallic inclusions using argon. The good distribution of argon bubbles in the tundish significantly influences the removal of unwanted melt components such as hydrogen and nitrogen. Given the need for gas to escape, the melt speed in the intermediate ladle should be sufficiently low, especially near outflow holes, where melt needs to be homogeneous and slow for a high–quality casting. Conducting experiments during the operation of a metallurgical plant is undesirable, costly and is accompanied by difficulties associated with high temperature and opacity of the melt. Therefore, the experiments are often carried out in laboratories on the so-called cold models, where the melt is replaced by water, argon – by air, and the tundish – by the transparent container of the rectangular shape under the conditions of similarity. Despite the obvious advantages of such cold modeling, today most experiments are still conducted on mathematical models, which are a much cheaper and low-erroneous way of predicting the development of a given process under different conditions. Mathematical modeling of melt motion helps to select the optimal geometry of the tundish, as well as the required amount of argon and usefulness of barriers on a way of melt streams. The article proposes to use the convection-diffusion equation for the argon field and the Navier-Stokes equations – for the velocity field. The numerical solution using finite volume method is well tested and provides sufficient accuracy. In addition, this method is easily parallelized to speed up computing on modern multi-core processors. A graphical user interface software application allows you to display the status of the system on the screen for further review and adoption decisions.

Position Control and Alignment of the CCM Equipment

2019 ◽  
Vol 946 ◽  
pp. 644-649 ◽  
Author(s):  
Andrei Sholomitskii ◽  
Aleksey Sotnikov
Keyword(s):  
Continuous Casting ◽  
Position Control ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Cast Ingot ◽  
Different Types ◽  
Continuously Cast ◽  
Improved Technology ◽  
The Mathematical Model

The improved technology of position control and alignment of the continuous casting machine (CCM) equipment based on high-precision online geodetic measurements is considered. The mathematical model for the technological axis of the continuous casting machine, the technique of the rational alignment of the machine’s equipment and the software implementing this technique are proposed. The application experience of the developed technique for control and aligning the equipment of continuous casting machines of different types is shown. The data on the efficiency of the technique for continuous casting machine equipment and its impact on the quality of a continuously cast ingot are presented.

Selection of refractory concrete for batching nozzles of an intermediate ladle of continuous casting machine

2020 ◽  
pp. 21-24
Author(s):  
A. S. Timofeeva ◽  
V. D. Shishkin ◽  
N. A. Morozova
Keyword(s):  
Thermal Properties ◽  
Continuous Casting ◽  
Refractory Concrete ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
Intermediate Ladle ◽  
Continuous Casting Of Steel ◽  
Standard Methods ◽  
Production Conditions ◽  
Selection Of

The paper presents experimental research on selection of refractory concrete for the glass dosing promove in continuous casting of steel. In the experiments we consider three types of refractory concrete determined by their basic thermal properties using standard methods and the selected refractory concrete with the best performance. The batcher glass was manufactured and tested in production conditions, which showed good results in continuous casting of steel.

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